1660648544923 has 2 divisors, whose sum is σ = 1660648544924. Its totient is φ = 1660648544922.

The previous prime is 1660648544909. The next prime is 1660648544969. The reversal of 1660648544923 is 3294458460661.

It is a weak prime.

It is an emirp because it is prime and its reverse (3294458460661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1660648544923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1660648544123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830324272461 + 830324272462.

It is an arithmetic number, because the mean of its divisors is an integer number (830324272462).

Almost surely, 2^{1660648544923} is an apocalyptic number.

1660648544923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660648544923 is an equidigital number, since it uses as much as digits as its factorization.

1660648544923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29859840, while the sum is 58.

The spelling of 1660648544923 in words is "one trillion, six hundred sixty billion, six hundred forty-eight million, five hundred forty-four thousand, nine hundred twenty-three".